Telephone call-bell or ringer.



7 O 9 1i 0 2 mm U A D E T N E T A P Pm N I L S T. A K W O 2 y 3 6 00 m N TELEPHONE CALL BELL 0R RINGER.

' APPLICATION FILED MAR. 2. 1906- QLMM IINITED STATES PATENT OFFICE.

WILLIAM KAISLING, OF CHICAGO, ILLINOIS, ASSIGNOR TO MILO G. KELLOGG, OF CHICAGO, ILLINOIS.

TELEPHONE CALL-BELL OR RINGER.

Patented Aug. 20, 1907.

Application filed March 2, 1906. Serial No. 303,872.

To all whom "it may concern:

Be it known that 1, WILLIAM KArsLrNG, a citizen of the United States, and a resident of Chicago, county of Cook, and State of Illinois, have invented a new and useful Improvement in Telephone Call-Bells or Ringers, of which the following is a specification.

The present invention relates to polarized telephone call-bells or ringers, and the object of the invention is to provide a device of this type with novel means for adjusting the position of its armature and bell-hammer.

The character of the invention will be best understood upon reference to the following description taken in connection with the accompanying drawing, and the scope of the invention will be particularly pointed out in the appended claims.

Referring to said drawing, Figure l is a front elevation of a call-bell or ringer constructed in accordance,

with the invention, showing the bell-hammer and armature in an intermediate position; Fig.2 is a side elevation of the same; Fig. 3 is a bottom plan view in which parts are omitted for clearness; and Fig. 4 is a partial sectional view of the lower end of one of the magnet cores and the adjacent parts. Throughout these views, like characters refer to like parts.

The callbell or ringer illustrated belongs, in general, to a well known type and comprises essentially an electromagnet E, operating upon an armature A to strike a hammer H. alternately against the gongs G. The gongs are carried upon posts 10, projecting upwardly from a supporting plate 11, to which the down wardly projecting magnet cores 12 are also attached by means of the screws 13. A permanent magnet 14 is also secured to the plate 12 and projects downward therefrom and forward under the armature A and is instrumental in polarizing the latter. The magnet spools 15, which carry the energizing windings 16, are mounted upon the cores 12 which are spaced at their lower ends by means of a strip 17 of brass or other suitable material, through which the lower ends of the cores 12 are adapted to project. In assembling the parts, the holes in the strip 17 are given atiglit fit on the cores, so that they are rigidly held in position.

As clearly illustrated in Fig. 4, the lower ends of the magnet cores are threaded for the reception of supporting and adjusting nuts 18. Each of these nuts is provided with a peripheral groove 19, adapted to be engaged by a yoke 20 of brass or similar material, provided with downwardly projecting ears 21 which carry the trunnion-pin 22 and screw 23 which form the pivotal support for the armature A. The yoke 20 is punched out of a sheet of metal stock so as to leave an elongated central opening having a central portion, large enough to allow the passage of one of the nuts 18 through it, and contracted end portions whose walls are adapted to project into the grooves on the nuts when the parts are assembled. This is accomplished by making the distance between the opposing engaging portions a-b of the yoke the same as, or slightly greater than, the diameter of the grooved portion of the nuts 18. In assembling, before the nuts 18 are screwed on to the projecting ends of the cores 12, they are placed in position in the yoke 20. This is done by passing each nut through the central portion of the opening in said :yoke until the plane of its groove is co-incident with that of the yoke and then shifting the nut in said plane into its final position. With the nuts so positioned in the yoke, they may be readily screwed into place on the projecting ends of the cores, and the armature A, hammer II and permanent magnet 14 afterward put in place. From this, it will be seen that each nut is free to rotate in the yoke. In order to lock the nuts 18 against movement after adjustment, each is provided with a vertical slit 24. Also, to insure a firm engagement between the nuts 18 and the yoke 20, the latter has its ends bent slightly out of the plane of the yoke, thus insuring a good engagement with the walls of the grooves 19 and also yielding to permit of the proper positioning of the nuts upon the cores 12. The armatures are also provided with studs 25, or other suitable material, to prevent undue sticking of the armature against the ends of the cores.

In adjusting the position of the hammer H and the armature A, the nuts 18 may be screwed on or off of their corresponding cores by a wrench or other tool engaging their angular portions, and, when once positioned, will remain in such position, due to the slits 24 which allow the nuts to spring into close engagement with the threads of the core, and the yoke 20 will be held firmly by reason of its yielding engagement with the walls of the nuts, due to its bent ends.

Obviously, certain modifications may be made in the present disclosure without departing from the spirit and scope of my invention. For example, it will be at once apparent to those skilled in the art that the yoke 20 may be considerably modified in form and still be used with the grooved nuts 18. Clearly, other similar changes may be made. I, therefore, do not wish to be limited to the details of construction herein shown, but aim to cover, by the terms of the appended claims, all such modifications.

What I claim as new and desire to secure by Letters Patent of the United States is 1. A polarized call-bell 0r ringer comprising substantially parallel electromagncts having cores provided with projecting threaded ends, an armature supporting yoke extending between said ends and a single adjustable nut on each of said threaded ends connected to the adjacent end of said yoke so as to hold said yoke firmly and to carry it up and down therewith for purposes of adjustment.

2. A polarized calLbell or ringer comprising substantially parallel electroinagnets having cores provided with projecting threaded ends, an armature supporting yoke ex tending between said ends and a single adjustable nu t on each of said threaded ends rotatably connected to the adjacent end of said yoke and firmly holding the same in all adjusting positions.

A polarized call-bell or ringer comprising substantially parallel electromagnets having cores provided with projecting; threaded ends, an armature supporting yoke extending between said ends and a single adjustable nut on each of said threaded ends having a peripheral groove into which the adjacent ends of the yoke project.

4. A polarized call-bell or ringer comprising substantially parallel electromagnets having cores provided with projecting threaded ends, an adjustable nut on each of said threaded ends having a peripheral groove, and an armature supporting yoke having at each end opposing engaging portions resting in said grooves.

5. A polarized call-bell or ringer comprising substantially parallel electromagnets having cores provided with projecting threaded ends, an adjustable nut on each of said threaded ends having a peripheral groove, and an armature supporting yoke having an interior opening coinprising a central portion large enough to permit the passage of said nuts and contracted end portions whose Walls are adapted to project into the grooves on said nuts when the parts are assembled.

6. A polarized call-bell or ringer comprising substantially parallel electromagnets having cores provided with projecting threaded ends, an adjustable nut on each of said threaded ends having a, peripheral groove, and an armature supporting yoke of spring metal having at its ends engaging portions extending into said grooves, said portions being slightly sprung out of the plane of the yoke so as to bind against the opposite walls of the grooves.

7. A polarized call-bell or ringer comprising substantially parallel electromagnets having cores provided with projecting threaded ends, an adjustable nut on each of said threaded ends having a peripheral groove, and an armature supporting yoke of spring metal having an interior opening comprising a central portion large enough to permit the passage of said nuts and contracted end portions whose walls are adapted to project into the grooves on said nuts when the parts are assembled, the outer ends of said yoke being sprung out of the plane of the yoke so as to bind against the opposite walls of the grooves.

8. A polarized call-bell or ringer comprising substantially parallel electromagnets having cores provided with projecting threaded ends, an armature supporting yoke extending between said ends and a single adjustable nut on each of said threaded ends connected to the adjacent end of said yoke so as to carry it up and down therewith for purposes of adjustment, an armature pivotally connected at its center to said yoke so as to rock about an axis transverse to the plane of said magnets, and a hammer carried by said armature.

9. A polarized call-bell or ringer comprising substantially parallel electromagnets having cores provided with projecting threaded ends, an armature supporting yoke extending between said ends, a single adjustable nut on each of said threaded ends having a peripheral groove into which the adjacent ends of the yoke project, an armature pivotally connected at its center to said yoke so as to rock about an axis transverse to the plane of said magnets, and a hammer carried by said armature.

10. A polarized call-bell or ringer comprising substantially parallel electromagnets having cores provided with projecting threaded ends, an adjustable nut on each of said threaded ends having a peripheral groove, an armature supporting yoke having an interior opening comprising a central portion large enough to permit the passage of said nuts and contracted end portions whose walls are adapted to project into the grooves on said nuts when the parts are assembled, an armature pivotally connected at its center to said yoke so as to rock about an axis transverse to the plane of said magnets, and a hammer carried by said armature.

11. A polarized call-bell or ringer comprising substantially parallel electromagnets having cores providedwith projecting threaded ends, an adjustable nut on each of said threaded ends having a peripheral groove, an armature supporting yoke of spring metal having at its ends engaging portions extending into said grooves, said portions being slightly sprung out of the plane of the yoke so as to bind against the opposite walls of the grooves, an armature pivotally connected at its center to said yoke so as to rock about an axis transverse to the plane of said magnets, and a hammer carried by said armature.

12. A polarized callbell or ringer comprising substantially parallel electromagnets having cores provided with projecting threaded ends, a threaded nut on each of said threaded ends having a peripheral groove, an armature supporting yoke of spring metal having at its ends engaging portions extending into said grooves, said portions being slightly sprung out of the plane of the yoke so as to bind against the opposite walls of the grooves and said nuts being vertically slitted to lock them in adjusted position.

13. A polarized call-bell or ringer comprising substantially parallel electromagnets having cores provided with projecting threaded ends, a threaded nut on each of said threaded ends having a peripheral gr0ove,-an armature supporting yoke of spring metal having at its ends engaging portions extending into said grooves, said portions being slightly sprung out of the plane of the yoke so as to bind against the opposite walls of the grooves and said nuts being vertically slitted to lock them in adjusted position, an armature pivotally connected at its center to said yoke so as to rock about an axis transverse to the plane of said magnets, and a hammer carried by said armature.

14. A polarized call-bell or ringer comprising substantially parallel electromagnets having cores provided with projecting threaded ends, an adjustable nut on each of said threaded ends having a peripheral groove and an armature supporting yoke of spring metal having an interior opening comprising a central portion large enough to permit the passage of said nuts and contracted end por tions whose walls are adapted to project into the grooves on said nuts when the parts are assembled, the outer ends of said yoke being sprung out of the plane of the yoke so as to bind against the opposite walls of the grooves and said nuts being vertically slitted to lock them in adjusted position.

15. A polarized call-bell or ringer comprising substantially parallel electromagnets having cores provided with projecting, threaded ends, an adjustable nut on each of said threaded ends having a peripheral groove and an armature supporting yoke of spring metal having an interior opening comprising a central portion large enough to permit the passage of said nuts and contracted end portions whose Walls are adapted to project into the grooves on said nuts when the parts are assembled, the outer ends of said yoke being sprung out'of the plane of the yoke so as to bind against the opposite Walls of the grooves and said nuts being vertically slitted to lock them in adjusted position, an armature pivotally connected at its center to said yoke so as to rock about an axis transverse to the plane of said magnets, and a hammer carried by said armature.

In witness whereof, I hereunto subscribe my name this 27 day of February, A. D. 1906.

WILLIAM KAISLING.

Witnesses L. D. KnLLoGG, T. H. FERGUSON. 

